Method for continuously digesting cellulosic fiber by evenly spr

Details Method for continuously digesting cellulosic fiber by evenly spr Method for continuously digesting cellulosic fiber by evenly spr

1978-01-19

1979-05-22

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Continuous chemical treatment or continuous charging or...

162 52, 162 68, 162250, D21C 710

Patent

active

041558057

ABSTRACT:
A method for continuously digesting cellulosic fiber material so that the digested pulp has a very low quantity of reject material (i.e. one to two percent) compared to the prior art. Fiber material is continuously fed into a standing vessel downwardly through the vessel steam phase to establish a fiber level, digesting liquid being added to the vessel to maintain a liquid level therein, and the digested pulp being withdrawn from the bottom of the vessel. Spreading of the downwardly flowing fiber material in the steam phase substantially evenly over the vessel cross-section is effected and the downwardly flowing fiber material is heated by introducing a major portion of the steam to be introduced into the steam phase at a first vertical position about 0.0 to 100 cm. above the higher of the fiber and liquid levels in the vessel.
Some of the steam may be added at a second vertical level, or at a third vertical level.

REFERENCES:
patent: 258400 (1882-05-01), Frambach
patent: 850384 (1907-04-01), Mallam
patent: 1075795 (1913-10-01), Stanley
patent: 1813205 (1931-07-01), Scholz et al.
patent: 2858213 (1958-10-01), Durant et al.
patent: 2901039 (1959-08-01), Salmonson
patent: 3308011 (1967-03-01), Ross
patent: 3448002 (1969-06-01), Bryce et al.
patent: 3532594 (1970-10-01), Richter
patent: 3785920 (1974-01-01), Johansen
patent: 3802956 (1974-04-01), Backlund

Affiliated with

Also associated with

Rating

Method for continuously digesting cellulosic fiber by evenly spr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for continuously digesting cellulosic fiber by evenly spr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for continuously digesting cellulosic fiber by evenly spr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1039120